Knotter.



H. D. COLMAN.

KNOTTER.

APPLICATION FILED JUNE23I 1916.

w Patented @6h I2, 19m.,

2 SHEETS-SHEET 1.

II. COLMAN.

KNOTTER. APPLICATION FILED JUNE 23. 1916.

2 SHEETS-SHET 2.

rendesse.

illustrates the stripper hook.

nrtnrnn amarres ramena ernten.

HOWARD' 1D. COLMN, OF ROCKFORD, ILLINOIS, SSIGNOR, BY MESNE ASSIGNMENTS,T05 HOWARD D. COLT/IAN, LUTHER L. MILLER, AND HARRY A. SEVERSON, CPMTHEFAS BARBER-COLMAR COMPANY, OF ROCKFORD, llLLlNOIS.

KNUTTElEt.

Patented 'Fei-o.. 12., 1918.

@riginal application lerl .April 1, 1909, Serial No. 487,347. Dividedand this application led tune 33, 1913.

. Serial N0. 105,357.

To aZZ whom it may concern."

Beit known that l, HOWARD D. Corman, a citizen of the United States,residing at Rockford, in the county of ll/innebago and State ofillinois, have invented certain new and useful improvements inlnotter's, of which the following is a specification.

'1`his application is a division of application Serial No. 487,347, ledApril 1, 1909 (Patent No. 1,191,102 dated July 1l, 1916). rll`he presentinvention relates particularly to the means for actuating the tying-billand the clamping and stripping devices.

1n the accompanying drawings, Figure 1` is a perspective view of aknetter embodying the features of my invention. Fig. 2 is a view of acertain thread guide. Fig. 3 Figs. 4 and 5 are views of certain threadguides. Fig. 6 is a side elevation of the knetter. Fig. 7 is afragmental front elevation. Fig, 8 is a section on line 8 8 of Fig. 6.Figs. 9 and 10 are side elevations of a thread-clamping member.

rll`he knetter comprises a tying bill 1 which may be of any suitableconstruction, that herein shown being substantially similar to the oneillustrated in detail in Patent No. 755,110, dated March 22, 1904. Themovable jaw of the tying-bill is actuated by means of an extensionlocated within a cam barrel 2 which also is similar to the one shown insaid patent. 'lhe tying billv is carried by a shaft 3 (Fig. 6) which isrotatably mounted in the supporting frame of the knetter. Fixed to theshaft 3 is a bevel pinion 4 (Fig. 7) that meshes with bevel gear teeth 5formed upon one side of a segment 6. This segment is fixed upon a rockshaft 7 which is mounted in the framework of the knotter. The means forturning the shaft in the direction to actuate the knetter to tie theknot consists of a spring 8 anchored at one end to any suitable pointand attached at its other end to a pin 9 on a crank arm 10, said crankarm being xed to the shaft 7. The parts are releasably held in theinitial position by means of a locking pawl 11 fixed to a pivot 12 whichis journaled in the supporting framework, said pawl being arranged toengage a locking shoulder 13 fixed with relation to the shaft 7.. 1l.hand lever 14 is secured to the pivot 12. A spring 15 normally holds thepawl 11 in engagement wilh the shoulder 13.

At one side of the tying bill is fixed a thread guide 1G having thereina thread-receiving slot 17. At the opposite side of the tying bill arefixed two thread guides 18 and 19 having slots 20 and 21 which arealined withtheslotl7. Betweentheguides 18 and 19 is a stripper hook 22.The hook 22 is formed on a slide 23 mounted in the framework of theknetter. rlChe slide 23 is guided by means of two pins 24 set in theframework and extending through an elongated opening 25 in the slide. Onthe slide 23 is a flange 26. Rigid with the Harige 2G is an arm 27. Theslide 23 is arranged to be reciprocated by means including an arm 23pivoted to the framework at 29, said arm being connected to the arm 27by means of a pi-n-and-slot connection. The arm 28 iS rigid with an arm30 having a roller stud 31 that lies in a cam groove 32 formed in oneside of the segment G. lThe cam groove 32 comprises a dwell portion 32aand a cam portion 321.

Pivotally secured to the thread guide 19 at 33 is a thread clampingmember 34 comprising a spring clamping portion 35 lying in Contact withthe side of the thread guide 19 which faces the thread guide 18. 1'l`heedge 36 (Fig. 9) of the clamp member '34, and the lower edge of theportion 35 are arranged to be moved down over the slot 21 in the guide19 by means of a spring 37 anchored at 38 and connected to the clampingmember 34 by means of a link 39. The stripper hook 22 is arranged tomove the clamping member 34 up out of register with the slot in thethreadguide 19, the clamping member having a lip 40 which the stripperhook 22 engages as said hook is returning to initial position.

)The means for resetting knetter to initial position may be of anysuitable character. Herein is shown a hand lever 41 pivotally mountedupon the rock shaft 7 and carrying a pin 42 (Fig. 1 arranged to engage ashoulder 43 on the crank arm 10. By means of the hand lever 41, theoperator may turn the crank arm 10 against the tension of the spring 8until the pawl 11 springs into place beneath the locking shoulder 13.

the parts of the I have also shown means whereby a treadle (notillustrated) may be employed to reset the knotter. Said means comprisesa rod 44 having at its upper end a head 45 which is provided with asegmental slot 46 to receive a pin 47 xed with relation to the handlever 41.

If desired, means may be provided for supporting the end of a reservethread. I-lereinlis shown a spring clamp 48 supported upon the knotterframework in position to hold the end of a reserve thread extendingthrough the slots of the thread guides 16, 18 and 19 and beneath thetying bill 1 and the stripper hook 22.

The active threads may be supported in any suitable manner. Herein isshowna bracket 49 to which is secured a pivot pin 50 and two stop pins51 and 52. On the pivot pin 50 are mounted thread-lifters 53 havingthread-receiving eyes 54 and weighted rear ends 55. When threads arepassing through the eyes 54 the tension of the threads is sufiicient tohold the thread-lifters in contact with the stop pin 52, but when athread exhausts the weighted end 55 of the lifter engaged by said threadcauses the lifter to swinof into contact with the stop pin 51, thuslifpting the exhausted thread above the running threads so that theoperator mayreadily pick it up and place it in the knotter.

Assuming that the reserve thread is in osition at the knetter, as shownin the drawings, the operation is as follows: The operator inserts` theexhausted thread into the slots 17, 20 and 21, said thread extendingfrom the eye 54 of its lifter thence through the slot 21, beneath theclamping member 34 and the stripper hook 22, through the slot 20,beneath the tying bill 1 and through the slot 17. The operator thenreleases the spring 8 to action by pulling forward on the hand-lever 14,thus withdrawing the latch 11 from beneath the locking shoulder 13. Inthe rotation of the shaft the tying bill 1 is rotated to form the loo sof the knot 'and to trim oft the ends of t e knot. As the roller 31(Fig. 6) enters the cam portion 32b of the cam groove 32, the stripperhook 22 is drawn downwardly. As the stripper hook 22 descends, theclamping portions 35 and 36 move across the slot 21, thus clamping thethreads. rllhe descending stripper hook 22 pulls the threads down in thespace between the guides 18 and 19, thereby pulling the loops of theknot tight and finally pulling the ends of the knot out of the tyingbill. In the stripping operation the lower wall 20EL (Fig. 4) of theslot 20 serves as an abutment across which the threads are pulled by thestripper hook.

The extent of movement imparted tothe mechanism by the actuating spring8 is limited in a suitable way, as by contact of mamaria the shoulder 43with the pin 42 on the hand lever 41. The latter normally rests againstthe portion 41a of the framework of the knotter.

Io release the threads from the knotter, the hand-lever 41 or thetreadle hereinbefore mentioned is operated to turn the shaft 7 in thereverse direction until the pawl 11 springs into place beneath thelocking shoulder 13. In the upward movement of the stripper hook 22,said hook engages the lip 40 and thereby raises the clamping member 34above the slot 21, thus freeing the united threads.

I claim as my invention:

l. A knotter having, in combination, a shaft, a tying bill on saidshaft, a rockshaft, a member fixed on the rock-shaft and having bevelgear teeth upon one side, a bevel pinion on the tying-bill shaft meshingwith said bevel gear teeth, thread guides in operative relation to thetying bill, a, stripper hook operatively located with reference to saidguides, a slide carrying the stripper hook, a lever connected to saidslide, the before mentioned member havingin one side a cam slot, a studon said lever lying in said cam slot, and means for turning therock-shaft.

2. A knotter having, in combination, a shaft, a tying bill on saidshaft, a rock shaft, a drivmg'connection between said shafts, threadguides in operative relation to the tying bill, a stripper hook locatedin the space between two of said guides, a slide carrying the stripperhook, a lever connected to said slide for moving the stripper hook insaid space, a cam on the rock shaft, a stud on said lever engaging saidcam, and means for turning the rock shaft.

3. A knotter having, in combination, a tying bill, a thread clamp, astripper hook', and means on the stripper hook for normally holding saidthread clamp ineective to clampa thread.

4. A knotter having, in combination, a tying bill, a thread guide, anabutment between the tying bill and the thread guide, a stripper hooklarranged to engage the threads at a point between the thread guide andthe abutment, and a thread clamp arranged to clamp the threads at thethread guide before the stripper hook operates.

5. A knetter having, in combination, a tying bill, a thread. guide,knot-stripping means arranged to operate between the tying bill and saidthread guide, a clamping member movably mounted on said thread guide,and means for actuating said member to clamp the threads at the threadguide.

6. A knotter having, in combination, a tying bill, a thread guide, astripper hook arranged to engage the threads at a point between thethread guide and the tying bill,

lll@

a, thread clamp membenand a spring arranged to move the clamp member toclamp guide, and means for actuating said mem- 10 the threads at thethread guide, the stripper ber to clamp the threads at the thread guide,hook being arranged to move the clamp the stripping means being arrangedto actumember to release the threads. ate the clamping member to release-the 5' 7. A knotter having, in combination, a threads.

tying bill, a thread guide, knot-stripping In testimony whereof, havehereunto set M5 means arranged t0 operate between the tymy hand. ingbill and said thread guide, a clamping member movably mounted on saidthread HWARD D. CULMAN.

